Plug for the interior of a tube



FIG. 1 is a perspective view of the plug for the interior of a tube showing the design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a left side view thereof;

FIG. 8 is a cross-sectional view along the line 8—8 in FIG. 2; and,

FIG. 9 is a further cross-sectional view, along the line 8—8 in FIG. 2, showing the plug located in the interior of a tube, together with a jig for removing the plug from the tube.

The broken line showing of the tube and the jig for removing the plug from the tube is included for the purpose of illustrating use and environment and forms no part of the claimed design. 

The ornamental design for a plug for the interior of a tube, as shown and described. 